BTW, if you need a generic, scalable, high-volume B2BUA, it is not a "best practice" to use Asterisk for that purpose. -- Alex Balashov Evariste Systems Web : http://www.evaristesys.com/ Tel : (+1) (678) 954-0670 Direct : (+1) (678) 954-0671 Mobile : (+1) (678) 237-1775